Based on the poem A Margarita by Rubén Darío, which is included in the original Spanish and in an English translation by Rosalma Zubizarreta

When Margie's cousin Lupe comes from Mexico to live in California with Margie's family, Lupe must adapt to America, while Margie, who thought it would be fun to have her cousin there, finds that she's embarrassed by her in school and jealous of her at home